Display screen or portion thereof with a graphical user interface



This application is related to the following commonly owned co-pending patent application: U.S. application Ser. No. 29/743,409, entitled “Display Screen or Portion Thereof with a Graphical User Interface,”.

FIG. 1 is a front view of a display screen or portion thereof with a graphical user interface showing our new design; and,

FIG. 2 is a front view of a second embodiment thereof.

The dot dashed broken line showing the display screen or portion thereof forms no part of the claimed design. The dashed broken line showing portions of the graphical user interface form no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with a graphical user interface, as shown and described herein. 